Electric toaster with improved heat-up cool-down bimetal timer

ABSTRACT

An electric toaster with a heat-up cool-down bimetal timer wherein a separate bimetal timer control blade is positioned between a bimetal and its support for accurately controlling the pivot point of the bimetal during its heat-up cycle. A calibration screw is threaded through an end portion of the bimetal control blade. The calibration screw rests against a cam follower, and an improved arrangement is provided for adjusting the cam follower for reliably setting the toast brownness or color. A unique manual ON-OFF mechanism is also provided for allowing or preventing the bimetal timer from automatically moving from its heat-up cycle to its cool-down cycle.

United States Patent Snyder 154] ELECTRIC TOASTER WITH IMPROVED HEAT-UPCOOL-DOWN BIMETAL TIMER [72] Inventor: Paul V. Snyder, Whitehall, Pa.[73] Assignee: General Electric Company [22] Filed: July 22, 1971 [21]Appl. No.: 165,203

[52] US. Cl. ..219/413, 99/329, 99/393,

[51] Int. Cl ..F27d 11/02 [58] Field of Search ..219/395, 398, 405, 412,413, 219/521; 99/329, 359, 378, 389, 393, 443 R;

[56] References Cited UNITED STATES PATENTS 2,257,906 10/ 1941 Gough..99/327 2,563,755 8/1951 Sutton et al. ..99/329 2,624,268 1 1953Horvath ..99/329 2,773,441 12/1956 Ireland ..99/329 R23,600 12/1952Gardner ..99/329 2,643,061 6/1953 Johnson ..236/68 2,748,244 5/ l 956Nellis ..219/398 15] 3,684,860 51 Aug. 15, 1972 3,119,000 l/l964 Lochetal ..219/413 3,119,001 l/1964 Andrews ..219/413 3,152,243 10/1964Andrews ..219/405 3,412,236 11/1968 Hild et a1 ..219/413 3,560,7112/1971 Manecke ..219/413 3,585,360 6/1971 Young et al. ..219/4053,529,534 9/1970 Snyder ..99/329 Primary Examiner-Velodymyr Y. MayewskyAttorney-Lawrence R. Kempton et al.

[ 5 7] ABSTRACT An electric toaster with a heat-up cool-down bimetaltimer wherein a separate bimetal timer control blade is positionedbetween a bimetal and its support for accurately controlling the pivotpoint of the bimetal during its heat-up cycle. A calibration screw isthreaded through an end portion of the bimetal control blade. Thecalibration screw rests against a cam follower, and an improvedarrangement is provided for adjusting the cam follower for reliablysetting the toast brownness or color. A unique manual ON-OFF mechanismis also provided for allowing or preventing the bimetal timer fromautomatically moving from its heat-up cycle to its cool-down cycle.

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Pu/ S yder PATENTEDAuc 15 m2 SHEET 5 [IF 7 fm e/vzar Pau/ 1/ SnyderAlia/77g BACKGROUND OF THE INVENTION This invention relates to anelectric oven toaster, and more particularly to an improved compactheat-up cool-down bimetal timer for timing the toaster heating cycle.

In my prior US. Pat. No. 3,529,534, filed Apr. 3, 1969 and assigned tothe same assignee as the instant invention, I have disclosed a heat-upcool-down bimetal timer for timing the toasting period in a pop-up typetoaster. With such a mechanism, when a slice of bread or other food hasbeen placed in the toaster and the food is lowered by a conventionalpush-down lever, a switch closes an electric circuit to energize anelectric heater which is provided for toasting the bread. At the sametime, another heater is energized for heating a bimetal. After thebimetal has been heated a predetermined amount as indicated by thechange in the angle of bow of the bimetal, another switch is actuated todeenergize the bimetal heater. Then, the bimetal cools down and after apredetermined time as evidenced by the reverse change in the angle ofbow of the bimetal, the bimetal actuates a mechanism for de-energizingthe heating element which has been toasting a slice of bread. At thesame time, a mechanism is energized for lifting the toast so that it maybe removed from the toaster.

In a co-pending application of Harold DeRemer, Ser. No. 165,204, filedJuly 22, 1971, and assigned to the same assignee as the instantinvention, there is dis closed an electric oven toaster with athermostat for controlling energization of the heating elements when theoven toaster is being operated as an oven and a heat-up cool-downbimetal timer for controlling energization of the heating elements whenthe oven toaster is being operated as a toaster. My improved heat-upcool-down bimetal timer is partially disclosed in Harold DeRemersco-pending application and is the subject of the instant application.

While the basic components of a heat-up cool-down bimetal timer havebeen known, it is especially desirable that a heat-up cool-down bimetaltimer be reliably constructed and calibrated so that it will accuratelycontrol the duration of a toasting time interval, and hence, the coloror degree of brownness of the toast desired by a user of the oventoaster.

It is also desirable that such a heat-up cool-down timer be constructedso that it may be readily and inexpensively incorporated into anelectric oven toaster appliance which may be used both as an oven and atoaster.

Accordingly, it is a particular object of this invention to provide animproved heat-up cool-down bimetal timer which may be readily andreliably calibrated during manufacture for providing an effective timerto control the color or brownness of the toast desired by a user of theoven toaster.

It is another object of my invention to provide an improved heat upcool-down bimetal timer for an oven toaster which may be readilyincorporated with the control mechanism for an oven toaster utilizingrelatively few parts which may be inexpensively and reliably assembledto the control mechanism of the oven toaster.

It is also an object of this invention to provide an improved color cammechanism for a heat-up cool-down bimetal timer for manually setting thecolor and brownness of the toast desired by a user.

SUMMARY OF THE INVENTION In accordance with one of the aspects of thisinvention, an electric toaster with my improved heat-up cool-downbimetal timer includes an electric resistance wire heater for toasting aslice of bread or other food, and an electric resistance wire forheating a bimetal during a bimetal heat-up cycle. The toaster alsoincludes a rigid timer body member and a bimetal having two endportions. One of the end portions of the bimetal is connected to thetimer body member and the other end portion of the bimetal is a free endportion. A unique arrangement is provided for controlling the pivotpoint of the free end portion of the bimetal. This arrangement includesa control member which is also connected to the timer body and isprovided with a pivot surface which is arranged in engagement with thefree end portion of the bimetal. The position of the pivot surface ofthe bimetal control member with respect to the bimetal is veryaccurately set by a calibration member which is movably supported on thebimetal control member.

With this construction, the relative position of the pivot point for thefree end portion of the bimetal which controls the duration of theheat-up cycle of the bimetal is very accurately controlled and set by amanufacturing adjustment which is made by a calibration member which issupported on a bimetal control member. Thus, in making such amanufacturing adjustment it is not necessary to touch the bimetalitself, and it is also possible to adjust the calibration member withrespect to the relatively substantial timer body member which does notmove during relatively great changes in temperature or as a result ofrough handling of the oven toaster. For example, the calibration membermay take the form of a screw having an end which rotates on a flat plateof a manually adjustable cam follower member. By this arrangement, avery reliable and accurate manufacturing calibration may be made in myimproved heat-up cool-down bimetal timer.

BRIEF DESCRIPTION OF THE DRAWING Other objects and attendant advantagesof the invention will be apparent from the following description takenin connection with the accompanying drawing in which:

FIG. 1 is a perspective view of an electric oven toaster embodying myimproved heat-up cool-down bimetal timer;

FIG. 2 is a circuit diagram and partial schematic view of portions ofthe control mechanism for the electric toaster illustrated in FIG. 1;

FIG. 3 is a right-side perspective view of the oven toaster shown inFIG. 1 with a right-outside wall of the oven toaster removed in order toshow details of my improved timer mechanism;

FIG. 4 is a fragmentary side elevational view of a portion of theelectric oven toaster control mechanism shown in FIG. 3 illustrating thepositions of the parts at the commencement of a toasting cycle;

FIG. 5 is a fragmentary side elevational view similar to FIG. 4 showingthe OFF position of the parts at the V termination of a toasting cycle;

FIG. 6 is a fragmentary side elevational view similar to FIG. 4 showingthe positions of the parts when the oven toaster is being used as anoven;

FIG. 7 is a perspective view of the oven thermostat of the controlmechanism of the oven toaster shown in FIG. 3 illustrating thethermostat in its OFF position;

FIG. 8 is a perspective view of the oven thermostat similar to FIG. 7showing the thermostat in its OVEN position for regulating thetemperature in the oven toaster shown in FIG. 1;

FIG. 9 is a perspective view of the oven thermostat similar to FIG. 7showing the oven thermostat in its inoperative or TOAST position whenthe oven toaster is being controlled by its toaster bimetal timer;

FIG. 10 is a perspective view of the heat-up cooldown bimetal timershown in FIG. 3 showing the timer in its TOAST-BIMETAL HEAT-UP POSITION:

FIG. 11 is a perspective view of the bimetal toaster timer similar toFIG. 10 showing the timer in its TOAST-BIMETAL COOL-DOWN POSITION;

FIG. 12 is a perspective view of the bimetal toaster timer similar toFIG. 10 showing the position of the parts in the timer OFF positionwherein the timer is prevented from being moved into its cool-downcycle;

FIG. 13 is a fragmentary cross-sectional view of a portion of the colorcam mechanism of my improved bimetal timer taken substantially along theline 13-13 of FIG. 10 showing the cam in its highest position forsetting a light color or brownness of the toast desired by a user;

FIG. 14 is a fragmentary cross-sectional view similar to FIG. 13 showingthe color cam mechanism in its lowest setting for setting the timer tomake very dark toast;

FIG. 15 is an exploded fragmentary view of the free end portions of theheat-up cool-down bimetal and the bimetal control member shown in FIG.10;

FIG. 16 is a fragmentary left-side elevational view of the timer shownin FIG. 10 showing the position of the on-off actuator of the timer inthe timer off position wherein the timer is prevented from being movedinto its cool-down position;

FIG. 17 is a side elevational view similar to FIG. 16 showing the timeractuator in its on position wherein the timer is allowed to move fromits bimetal heat-up position into its bimetal cool-down position;

FIG. 18 is a fragmentary side perspective view of a function switchmechanism of the toaster control mechanism of the oven toaster shown inFIG. 3 showing the positions of the parts during a toasting cycle withthe function switch in its open position; and

FIG. 19 is a side elevational view of the oven toaster shown in FIG. 1with portions of the right outside wall broken away to show details ofconstruction.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawing andfirst particularly to FIGS. 1 and 2, there is shown an electric oventoaster 2 in which is mounted a generally horizontal carriage 3 forsupporting a food rack 4 for holding food to be cooked or bread to betoasted. The oven toaster includes a generally horizontal top wall 8,generally parallel vertical side walls 10 and 12, and a front opening 14to provide access to the inside of the oven toaster.

Sheet metal side plates 30 and 32 are positioned inside of the outerside walls 10 and 12 to define a cooking and toasting chamber 15. Theoven toaster also includes upper sheathed electric elements 22 and 23and lower heating elements 24 and 25 for toasting bread and heating thecooking chamber 15 A front door 16 is provided for closing the frontopening 14. The door 16 is pivotally mounted to the lower portion of theoven toaster, and as shown in FIG. 1 it is in its generally horizontalfull open position.

The food rack 4 is arranged to be moved partially through the frontopening 14 of the oven toaster when the door is moved to its full openposition as shown in FIG. 1. To achieve this in a conventional manner,the carriage 3 for supporting the food rack 4 includes two carriagelinks 26 and 28 which are mounted for slidable movement in a forward orrearward direction in the oven toaster. As shown in FIG. 19, a pair ofslots 27 and 29 are formed in each of the sheet metal side plates 30 and32 of the oven toaster, and outwardly projecting support pins 34 areinserted through the slots 27 and 29 and are riveted or otherwisesecured to the carriage links 26 and 28 in order to slidably support thecarriage links 26 and 28 on the side plates 30 and 32 of the oventoaster. The details of the door operating mechanism and the arrangementfor supporting the carriage links 26 and 28 on the sheet metal sideplates 30 and 32 of the oven toaster do not form a part of thisinvention and are described and illustrated in greater detail in aco-pending application of Paul V. Synder, Ser. No. 90,903, filed Nov.19, 1971, and assigned to the same assignee as the present invention.

As described in more detail in the aforementioned application, the frontdoor 16 of the oven toaster is linked to the carriage 3 so that movementof the carriage 3 in a forward direction will result in opening thefront door, and correspondingly pivotal movement of the front door in adoor opening direction will result in forward movement of the carriage 3including the food rack 4 through the front opening 14 of the oventoaster. To achieve this, two door links 50 and 52 are convenientlypivoted to the front door and to forward pins 34 on the carriage links26 and 28. Thus, it can be appreciated that when the door is manuallyopened by pulling on its front handle 20 the door will swing downwardlyabout its pivots and during this movement the door links 50 and 52 willpull outwardly on the pins 34 to slide the carriage 3 including links 26and 28 and the food rack 4 out of the front opening 14 of the toaster.It can also be appreciated that when the door is manually closed thecarriage links 26 and 28 are moved from their forward positionillustrated in FIG. 1 to their generally rearward position illustratedin FIG. 3. Thus, when the door 16 is opened the carriage links 26 and 28and the carriage 3 are moved forwardly, and when the door is closed thecarriage links 26 and 28 are moved rearwardly.

The controls for the oven toaster are mounted at the side of the oventoaster, and a primary manual setting member 60 and a toast brownnesscontrol knob 62 extend through a front plate 64 of the toaster so thatthey may be readily operated from the front of the oven toaster.

The components of the control mechanism are supported by the sheet metalside plate 32 and are positioned about the forwardly and rearwardlymovable carriage link 28 which is moved forwardly when the door 16 isopened and rearwardly when the door is closed. Thus, the carriage link28 may be utilized to prevent energization of the heating elements 22,23, 24 and 25 when the door is in its opened position illustrated inFIG. 1. To achieve this, an outwardly extending lug 68 may be riveted tothe carriage link 28, and a sleeve bearing 70 may be positioned over thelug 68 for moving an arm 72 of a main switch actuating lever 74 to opena main switch 40 when the door 16 is opened.

MAIN SWITCH With particular reference to FIG. 3, the main switch 40 ofthe oven toaster may be readily mounted on the generally horizontalbottom wall 66 of the sheet metal side plate 32 by tab 76 which may bestruck from the bottom wall 66 of the plate 32. The switch is shown incross section in FIGS. 4, 5 and 6 and diagrammatically in FIG. 2. Withthis construction, it can be appreciated that downward movement of theleft arm portion 78 of the switch actuating lever 74 will move a springwire switch actuating lever 80 downwardly to cause a cam member 83 to berotated to lift switch blades 44 until contacts 48 abut contacts 51 tothereby close the main switch 40. The details of the main switch 40 donot form a part of my invention and are described and illustrated ingreater detail in my prior US. Pat. No.

3,529,534, assigned to the same assignee as the present invention.

OVEN THERMOSTAT A thermostat 210 is mounted on side plate 32 of the oventoaster for controlling energization of the heating elements 22, 23, 24and 25 when the oven toaster is being operated as an oven. The detailsof the oven thermostat 210 do not form a part of my invention and areclaimed and described in greater detail in a co-pending application ofHarold DeRemer, Ser. No. 165,204, filed July 22, 1971, and assigned tothe same assignee as the instant invention.

In the embodiment illustrated, the thermostat 210 is positioned at theupper portion of the sheet metal side plate 32 above the carriage link28 and the primary manual setting mechanism 60-154 so that'it may bereadily controlled by the primary manual setting mechanism and thetoaster carriage link 28.

As shown in FIGS. 7, 8 and 9, thermostat 210 includes a stack ofinsulating disks 216, 218 and 220 for spacing two switch blades 212 and214 and a mounting bracket 222. The mounting bracket 222 is generally U-shaped and includes a relatively rigid portion 221 which may beconnected to the side plate 32 of the oven toaster by a screw 230 orother suitable securing means. As shown in FIG. 9, a bimetal blade 224is connected to an arm 226 of the mounting bracket by a rivet, and asshown in FIG. 3, it is positioned adjacent to an aperture 228 which maybe formed in the upper portion of the sheet metal side plate 32 forsensing the temperature within the oven chamber 15. The switch blades212 and 214 are normally spring biased toward each other to closecontacts 232 and 234 which are connected to the end portions of theswitch blades, respectively.

An elongated actuating pin 236 is fixed to switch blade 212, and aceramic insulator 238 is fixed to the end of the thermostat bimetal 224for permitting the bimetal to open the switch contacts 232 and 234 uponan increase in temperature. Since the bimetal 224 is mounted in goodheat exchange relationship with the oven toaster through the aperture228 which is formed in the sheet metal side plate 32, an increase intemperature within the oven will cause the bimetal 224 and the insulator238 to move to the right as shown in FIG. 8 to abut pin 236 to move itand switch blade 212 to the right to open contacts 232 and 234.

A cam mechanism is provided for manually adjusting the relative positionof the switch blades 212 and 214 to the bimetal 224 for varying thetemperature setting of the oven thermostat and for preventing operationof the oven thermostat 210 while the oven toaster is being operated bythe toaster timer 82 as a toaster. As shown more particularly in FIG. 7,the cam mechanism includes a generally curved piece of phenolic material240 which is rotatably mounted on a shaft 242 which extends through thefixed end portions of the switch blades 212 and 214, and the ceramicinsulators 216, 218 and 220. The cam 240 changes the thermostat settingsby physically moving the entire switch blade assembly 212 and 214 awayfrom the bimetal blade 224. To achieve this, a screw 244 or othersuitable projection may be connected to an arm 246 of the thermostatbracket 222 for cooperating with a cam surface which may be convenientlyformed on the phenolic cam 240. As shown, the cam 240 includes a ratherpronounced depression 248, a gently curved portion 250 which extendstoward the sheet metal side plate 32 and to the left as shown in FIG. 7,and a steep cam surface 252 which extends upwardly from the depression248. In addition, the bracket 222 includes a relatively thin flexibleportion 223 which extends from the ceramic insulators 216, 218 and 220to a relatively rigid portion 221 which is connected to the side plate32.

With this construction, it can be appreciated that when the screwprojection 244 is in the notch 248, the thermostat is in its lowesttemperature setting since the actuating pin 236 is in its closestposition to the insulator 238 of the bimetal. As the cam 240 is rotatedclockwise from the position illustrated in FIG. 7, the generally smoothcam surface 250 of the cam 240 will slide on the end of the projection244 to permit the entire switch blade assembly 212 and 214 to pivotabout the flexible portion 223 of the bracket to gradually movetheentire switch blade assembly 212 and 214, and particularly theprojection 236 further away from the ceramic insulator 238 of thebimetal to thereby increase the temperature setting of the thermostat.Thus, in order to open the switch contacts 232 and 234 upon an increasein the temperature in the oven, the bimetal 224, and the insulatedbutton which is positioned at the end of the bimetal will have to bemoved a greater distance. Accordingly, the oven temperature setting isincreased as the cam member 240 is rotated clockwise from the positionillustrated in FIG. 7 to the position illustrated in FIG. 8.

The highest cam surface 252 of thermostat cam 240 is utilized forpreventing operation of the thermostat 210 when the oven toaster isbeing operated as a toaster. It can be seen that when the cam 240 isrotated a relatively short distance counterclockwise from the positionillustrated in FIG. 7 to the position illustrated in FIG. 9, the end ofprojection 244 will be placed at the highest point 252 on cam 240 topermit the entire switch blade assembly 212 and 214 to be moved arelatively great distance away from bimetal 224. The spacing is so greatin this position that upon an increase in temp. within the cookingchamber the insulator 238 of bimetal 224 cannot contact the projection236 before the toaster timer 82 terminates the toasting cycle.

The primary manual setting mechanism includes a linkage or manuallyvarying the relative position of the thermostat cam 240 to the screwprojection 244. As shown more particularly in FIGS. 3, 6 and 8, anaperture 254 is form in an end portion of the cam 240 for receiving apivot pin 256 which may be passed through an end of a link lever 258. Asshown in FIG. 6, the other end of the link lever 258 is pivoted to agenerally central portion of my primary manual setting lever 154 bymeans of a pivot pin 309. Thus, the oven temperature setting may bereadily adjusted by simply manually moving the push button 60 upwardlyor downwardly across the front wall 64 of the oven toaster. It can beappreciated that as the push button is lifted, the primary manualsetting lever 154 will be pivoted clockwise about its pivot 306 to liftthe link lever 258 which in turn pivots the thermostat cam lever 240 ina clockwise direction about its shaft 242. This movement will result ina slidable movement of the smooth surface 250 of the cam 240 on the endof the screw 244 to cause the switch blade assembly 212 and 214 to bemoved further and further away from the insulated button 238. Thus, theoven temperature setting is increased as the push button 60 is liftedalong the front wall 64 of the oven toaster.

CIRCUIT DIAGRAM The circuit for the oven toaster is illustrated in FIG.2. As shown, it includes thermostat 212-214 for controlling energizationof the heating elements 22, 23, 24 and 25 when the oven toaster is beingoperated as an oven, my unique heat-up cool-down bimetal timer 82 fortiming a toasting cycle when the oven toaster is being operated as atoaster, a solenoid 132 for opening a main switch 40 at the end of atoasting cycle, a function switch 262 and shunt resistor 260 forpermitting a limited amount of current to flow to the bimetal heater 106to provide a limited amount of current to preheat the bimetal when theoven toaster is being operated as an oven, and an indicator lamp 296 forindicating that the main switch 40 has been closed and that power isbeing supplied to the appliance.

When it is desired to operate the oven toaster a an oven, the mainswitch 40 should be closed, the function switch 262 should be closed, heheat-up cool-down bimetal timer should be prevented from energizing thesolenoid 132 to open the main switch, and the actuating pin 236 onswitch blade 212 of the thermostat should be placed in relative closeproximity to the insulator button 238 of the thermostat bimetal 224 topermit the thermostat switch 232 and 234 to regulate the temperaturewithin the oven.

When it is desired to operate the oven toaster as a toaster, it can beseen that the main switch 40 should be closed, the function switch 262should be opened to permit full current to flow through the bimetalheater 106 of the heat-up cool-down bimetal timer, and the bimetal timer82 should be placed in its operative position wherein switch blade isallowed to move upwardly at the end of the bimetal heat-up cycle toplace the switch contacts of the bimetal heat-up cool-down timer intheir cool-down position with switch contacts 108 and 109 open andswitch contacts 116 and 118 closed. Moreover, the oven thermostat shouldbe moved to the position illustrated in FIG. 9 wherein the set screwprojection 244 is placed on the highest surface 252 of the thermostatcam for camming the thermostat switch blades 212 and 214 far away fromthe bimetal insulator button 238 to prevent the bimetal 224 fromcontrolling the temperature within the oven toaster.

FUNCTION SWITCH ARRANGEMENT FOR HEATING TOASTER TIMER DURING OVENOPERATION I The heat-up cool-down bimetal timer 82 is calibrated so thatin spite of the fact that it takes less time to toast a slice of breadafter the toasting chamber has been warmed by a prior toasting cycle, itwill toast the next succeeding slice of bread to the same degree ofbrownness without changing the toast setting on knob 62. To achieve thissame effect after a prior oven operation, the heat-up cool-down bimetaltimer is heated to the same degree that it would be heated by apreceding toast cycle. As shown in the circuit diagram illustrated inFIG. 2, a shunt resistor 260 and a function switch 262 are positioned ina circuit between the main switch 40 and the upper blade 112 of thebimetal heater switch 108. The shunt resistor 260 is of approximately 5ohms, and with this arrangement when the push button 60 is moved fromits middle OFF position upwardly to one of the oven temperature settingsthe function switch 262 is permitted to close by the upward movement ofan insulated tab 264 which is operated by the push button control lever154, as shown in FIG. 18. Conversely, when the push button 60 is moveddownwardly from its neutral OFF position v the insulated tab 264 moves aswitch blade 270 of the function switch 262 downwardly to thereby openthe switch 262 and remove the resistance 260 from the circuit to thebimetal heater 106. By this unique arrangement the heat-up cool-downbimetal timer 82 may be readily preheated to the desired amount bysimply adding a shunt resistor 260 and a function switch 262 to thecircuitry for the oven toaster.

The mechanism for closing and opening the function switch 262 isachieved at a relatively low cost by the use of an insulated tab 264which may be readily operated by the push button lever 154 which alsocontrols energization of the main switch.

As shown more particularly in FIG. 18, the function switch 262 may beconveniently mounted on a bracket 266 which is fixed to a sheet metalmounting plate 267 for my primary manual setting mechanism. Asillustrated, the function switch includes two switch blades 268 and 270having contacts 272 and 274 mounted at the ends of the blades,respectively. A suitable stack of the ceramic insulators 276, 278 and280 are positioned between and on opposite sides of the switch blades268 and 270 in order to insulate the blades from the bracket member 266.The assembly also includes insulator 282 and terminals 286 and 288 toprovide appropriate connection means for the circuitry illustrated inFIG. 2. As shown in FIG. 15, the insulated tab 264 extends through anaperture 292 which is formed in the sheet metal mounting plate 267. Thetab 264 is connected to a lever 294 which is pivoted to the mountingplate 267 by a suitable rivet 293. As shown, the lever 294 includes anupper surface 295 for engagement with a lower surface of the primarymanual setting lever 154.

With particular reference to FIG. 18, it can be appreciated that thelower switch blade 270 is wider than the upper blade 268 and it extendsforwardly from the upper blade 268 for enabling the insulated tab 264 tooperate the switch. With this construction, when the lower surface ofthe push-button lever 154 is positioned up and away from the surface 295of. the function switch lever 294, the resiliency of the lower switchblade 270 moves the lower switch blade i270 upwardly against the forceof the insulated tab 264 and its lever 294 to close the function switch262. Conversely, when the push button 60 is depressed to lower thepush-button lever 154 to the toast position illustrated in FIG. 4, thelower surface of the lever 154 abuts the upper surface 295 of thefunction switch lever 294 to lower the lever 294 and the insulated tab264 which is attached to the lever to move the lower switch blade 270downwardly to open the function switch 262.

PRIMARY MANUAL SETTING MECHANISM down bimetal timer 82 and the oventhermostat 212 aprimary manual setting mechanism including a lever 154and latch construction 90 for moving and holding the control componentsin a plurality of oven temperature positions, an off position, or atoast position. As shown more particularly in FIGS. 4, and 6, theprimary manual setting mechanism includes a sheet metal plate 267 whichis positioned between the oven thermostat 212-214 and the toastercarriage link 28. It is held spaced away from the sheet metal side plate32 of the oven toaster by means of a bracket 300 which may be riveted orotherwise secured to the sheet metal side plate 32. The bracket 300includes two outwardly extending arms 302 and 304, and the sheet metalmounting plate 267 of the manual setting mechanism may be connected tothe bracket 300 by means of screws 305 or other suitable securing means.

The mounting plate 267 includes a generally horizontal short pivot slot306 and a generally vertical elongated slot 308 for mounting my uniquepush-button lever 154. As shown, a rivet 156 having a head portion 157is fixed to one end of the push-button lever 154 for pivotally mountingthe lever at the slot 306. It can be seen that the lever 154 ispositioned on one side of the mounting plate 267 in the vicinity of thepivot In order to smoothly guide the push-button lever 154 as it isrotated within its pivot slot 306, a pin 310 is staked to a centralportion of the lever 154 for holding a roller 312 which is receivedwithin the vertical slot 308.

The primary manual setting mechanism also includes the link lever 258for controlling operation of the thermostat cam 240 which is pivotallymounted on a central portion of the push-button lever 154 by a rivet309. As shown, the upper portion of the lever 258 is provided with anoutwardly extending pin 256 for receiving an aperture 254 which isformed in the end of the cam lever 240.

As generally indicated in the foregoing discussion, the primary manualsetting mechanism and particularly the push-button lever 154 operates amechanism for opening and closing main switch 40. As shown moreparticularly in FIGS. 4, 5 and 6, this main switch operating mechanismincludes a rotatable cam 162 which is pivotally mounted on the primarymanual setting mechanism mounting plate 267 by means of a rivet 164. Thecam is generally circular in shape and it includes a slot 165 forreceiving a drive pin which is fixed to and extends outwardly from thepush-button lever 154. With this construction, it can be appreciatedthat upward and downward pivotal movement of the push-button lever 154will rotate the cam 162 in a clockwise or counterclockwise directionabout its pivot 154. It can be seen that upon upward movement of thepush-button lever 154, the pin 160 will abut an upper right surface ofthe slot 165 to move the cam 162 in a counterclockwise direction.Conversely, downward movement of the push-button lever 154 will causethe drive pin 160 to abut the opposite surface of the slot 165 to causethe cam 162 to be rotated in a clockwise direction.

The cam 162 is provided with an off notch 169 and raised cam surfaces171 and 173 on opposite sides of the off notch for controlling actuationof the main switch actuating levers 74, 76 and 80. With particularreference to FIG. 5, it can be appreciated that when a detent lug 166 ofthe switch actuating levers is positioned in the off notch the mainswitch 40 is in its open position. When the wire switch actuating lever80 is moved downwardly the switch is closed, and when it is allowed tomove upwardly the switch is moved to its open or off positionillustrated in FIG. 5.

A switch actuating lever mechanism 71-73, and 74-78 is positionedbetween the cam 162 and the wire actuating lever 80. As shown, themechanism includes an intermediate lever 71-73 which is pivotallymounted at 75 to the primary manual setting mechanism support plate 267,and an actuating lever 74-78 which is pivotally mounted to theintermediate lever 71-73 by means of a pivot 75.

A cam lever 316 is provided for cooperating with cam 162 to resilientlyurge the cam 162 in a clockwise or counterclockwise direction. As shown,a spring 314 is positioned between the upper vertical arm 71 of theintermediate lever and the cam lever 316, and the lever 316 may beconveniently pivoted to the support plate 267 by means of a pivot 318.With this construction, the spring 314 which normally holds detent 166into the off notch 169 of cam 162 also urges lever 316 to the left.

The primary manual setting mechanism also includes a latch and leverarrangement for holding the lever 154 in the toast position illustratedin FIG. 4 with the main switch 40 closed until the heat-up cool-downbimetal timer 82 has completed a cycle of operation and it is desired toautomatically open the main switch. As shown in FIG. 4, the mechanismincludes a latch lever 90 which may be pivotally mounted at 148 to thesupport plate 267. A hook latch portion 150 is formed above the pivot148 for gripping a pin 152 to hold the push-button lever 154 in thetoast position illustrated in FIG. 4. As shown, the latch pin 152 isfixed to a lever 320 which may be suitably pivotally mounted on forwardportion of the push-button lever 154 by a pivot pin 322. The lever 320is provided with an upper projecting portion 324 for normally holdingthe lever and the detent pin 152 in the position illustrated in FIG. 6with the projection 324 resting on the upper surface of the latch lever154.

With particular reference to the TOAST position shown in FIG. 4 and theOFF position illustrated in FIG. 5, it can also be appreciated that thepush-button lever 154 is normally spring urged to the OFF position bythe spring 158 which moves a tab 338 of lever 154. As illustrated inFIGS. 4, and 6, two tabs 326 and 328 are integrally formed with themounting plate 267.-

They extend outwardly from the mounting plate, and apertures 330 and 332are formed in each of the tabs 326 and 328, respectively, for receivinga slidable rod plunger member 334. As shown, plunger 334 includes a headportion 336, and the spring 158 is positioned between the head 336 ofthe plunger and the upper surface of tab 326.

The upper surface of the head of the plunger 334 is arranged forcooperation with the outwardly extending tab 338 which is integrallyformed with the push-button lever 154. In order to provide smoothgliding contact between the head 336 of the plunger 334 and the tab 338,a plastic button 337 may be positioned on the lower surface of tab 338.As illustrated-in FIG. 6, a reduced diameter potion 339 of the button337 may extend through an aperture which is formed in tab 33 forconnecting the button to the tab.

With this construction, it can be seen that the pushbutton lever 154 ismoved downwardly so that the lower surface of the button 337 abuts thetop of head 336. As shown in FIG. 5, spring 314 is urged into the offnotch 169 of the cam 162 to rotate the cam 162 in a clockwise directionto move its drive pin 160 and the push-button lever 154 to which it isattached downwardly, gravity urges the lever 154 downwardly, and spring80 also urges the lever 154 downwardly until the lower surface of tab338 abuts the head of plunger 336. The spring 158 acting between thehead 336 of the plunger and the upper surface of tab 326 preventsfurther downward movement of the tab 338.

In order to limit upward movement of the plunger 334, a C washer 340 maybe snapped onto a groove formed in the plunger. As shown in FIG. 5, theupper surface of the C" washer cooperates with a lower surface of tab326 to limit upward movement of the plunger 334 under the influence ofspring 158.

The previously mentioned solenoid-operated latch 140-142 is alsopivotally mounted on my primary manual setting mechanism mounting plate267. As

shown, the solenoid-operated lever and latch includes a generallyvertical lever portion 88 and a generally horizontal latch lever portion140. A tab 342 extends from the major portion of the solenoid lever 88and is arranged generally parallel to the latch lever for sorting thelatch lever 140 and the solenoid lever 88 on a shaft 145. As shown, thelatch lever 140 and the tab 342 are provided with apertures 344 and 346,respectively, for mounting the solenoid lever 88 and its integrallyformed latch lever portion 140 on the shaft which may be fixed to themounting plate 267. The upper portion of the solenoid lever 88 includesa slotted portion 348 for connection with an axially movable plunger 134of the solenoid 132. The plunger 134 of the solenoid is normally springbiased forwardly to pivot the solenoid lever 88 nd its latch lever 140in a counterclockwise direction, and when the solenoid is energized bythe flow of electric current through its coil the plunger 134 is movedinwardly against the force of the internal spring of the solenoid topivot the solenoid lever 88 and its latch lever 140 in a clockwisedirection about their common pivot shaft 145.

With this construction, it can be appreciated that when the push-buttonlever 154 is depressed from its OFF position illustrated in FIG. 5 toits TOAST position illustrated in FIG. 4, the tab 338 and its button 337are brought into engagement with the upper surface of head 336 of theplunger 334 to move the plunger and the push-button lever 154 downwardlyagainst the force of spring 158. Continued downward motion causes thelug 152 to be moved into engagement with the hook of latch lever 90 topivot latch lever 90 counterclockwise to move pin 144 into notch 142 oflatch 140 to hold the push-button lever 154 in the TOAST positionillustrated in FIG. 4 when the push button is released. This downwardmotion of the pushbutton lever 154 also moves the cam drive pindownwardly to rotate the cam 162 from the OFF position illustrated inFIG. 5 to the TOAST position illustrated in FIG. 4 erin the detent lug166 is moved from the off notch 169 downwardly onto the toast camsurface 173. This rotational movement of the cam 162 thus causesdownward movement of the lug 166, clockwise movement of lever 71-73 abutpivot pin 67 and downward movement of the switch actuating lever 72-78.Thus, with the door 16 in its closed position so that lug 68 is in aposition behind pivot 75 this downward movement causes the right side oflever 72-78 to abut lug 68 to cause counterclockwise movement of thelever 78 to move the spring switch actuating lever 80 downwardly tothereby close the switch.

Accordingly, it can be appreciated that when the primary manual settingmechanism is moved from its OFF position illustrated in FIG. 5 to itsTOAST position illustrated in FIG. 4, lever 90 is latched in theposition illustrated in FIG. 4 by he solenoid latch lever 88. Withparticular reference to FIGS. 3, 4, 11 and 12, it can be appreciatedthat lug 206 on lever 90 is provided for cooperating with my uniqueheat-up cool-down bimetal timer actuator 92 for permitting operation ofthe timer 82 to control a toast cycle when the push button 60 and lever154 are moved to the TOAST position illustrated in FIG. 4.

13 HEAT-UP COOL-DOWN TIMER In accordance with my invention, a uniqueheat-up cool-down bimetal timer 82 is provided for timing the toasterheating cycle. As shown in FIG. 3, the timer 82 is mounted on a lowergenerally horizontal wall 66 of the sheet metal side plate 32 by tabs 84which may be readily truck upwardly from the relatively thin sheet metalside plate. As shown, the heat-up cool-down bimetal timer 82 ispositioned below the forwardly and rearwardly movable carriage 28 sothat the carriage 28 may prevent operation of the timer 82 when the dooris moved to its opened position illustrated in FIG. 1. To achieve this,a tab 86 is integrally formed with the carriage 28 and extends outwardlyfrom the carriage for cooperation with a solenoid latch lever 88 whichin turn cooperates with the pivoted latch lever 90 of the primary manualsetting mechanism which in turn cooperates with an actuator 92 of myheat-up cooldown bimetal timer to reset the timer 82 to its heat-upposition when the door 16 is open.

The heat-up cool-down bimetal timer 82 is also uniquely constructed andspecifically located below the latch lever 90 of the manual controlmechanism so that when the manual control mechanism is moved from theOFF position illustrated in FIGS. and 12 to the TOAST positionillustrated in FIGS. 4 and 10, the lug 207 at the lower portion of thelatch lever 90 can cooperate with my uniquely constructed and locatedbimetal timer actuator 92 to permit the timer to be moved into itsheat-up cycle.

While the heat-up cool-down bimetal timer 82 and its actuatorarrangement 92 form a part of my invention, the primary manual settingmechanism 154-90 does not form a part of my invention and is claimed anddescribed in greater detail in the aforementioned copending applicationof Harold DeRemer, Ser. No. 165,204, filed July 22, 1971, assigned tothe same assignee as the instant invention.

As shown in FIGS. 4 and 10, when the main oven toaster heater switch 48has been placed in its closed position by the primary manual settingmechanism to start toasting a slice of bread, the heat-up cool-downbimetal timer 82 is also energized to control the duration of thetoasting time interval. The bimetal timer supporting structure includesa generally L-shaped piece of phenolic 94 or other suitable insulatingmaterial. The phenolic support consists of a generally flat bottom wallportion 96 and a generally vertical wall portion 98. The vertical wallportion 98 includes an outwardly extending projection 100 for mounting abimetal 102.

As shown more particularly in FIGS. 10, 11 and 12, a switch blade andsupporting member 110 is provided for connecting bimetal 102 to abracket 101 and for mounting contact 116. The switch blade and mountingmember 110 includes a generally vertical wall portion 103 for uniquelypivoting the bimetal. The wall portion 103 may be riveted at 105 to thebracket 101 which is secured to the insulating projection 100 whichextends outwardly from the vertical wall of the timer body. The bimetal102 includes a leg 107 arranged generally perpendicular to the majorportion of the bimetal for connecting the bimetal to the outwardlyextending wall portion 103. As illustrated, the bimetal 102 is arrangedgenerally parallel to the vertical wall 98 and is spaced a shortdistance from it by the outwardly extending projection 100. Leaf springmember 110 is arranged generally perpendicular to the plane of bimetal102 and is spring biased inwardly toward the vertical wall 98 of thetimer body member and upwardly away from the bimetal 102. The leafspring switch blade member 110 also includes a rear surface portion 111for cooperation with an outwardly extending projection 114 which may beuniquely integrally formed with the vertical wall 98 of the timer bodymember.

With particular reference to FIG. 10 and 11, it can be appreciated thatthe contact 116 which forms one of the contacts of switch 116-118 ismounted on the upper surface of switch blade 110. The other contact 118of switch 116-118 mounted on a switch blade 112. As shown in FIG. 10,the switch blade 112 is generally L-shaped and is sandwiched to thegenerally vertical wall 98 of the timer body member by means of aterminal piece of sheet metal 113. The switch blade 112 extendsoutwardly from the rear vertical wall 98 and, thus, it is arranged at anangle which is perpendicular to both the bimetal 102 and the switchblade 110. As shown more particularly in FIGS. 10 and 11, switch blade112 includes a contact 108 which constitutes the upper contact of switch108-109, and as shown the contact 108 is formed on the lower surface ofswitch blade 112.

The lower contact 109 of switch 108-109 is connected to the uppersurface of a relatively rigid L-shape sheet metal bracket member 119. Asshown, one of the legs of the bracket 119 is secured to the generallyvertical wall 98 of the timer body member. One end of the bimetal heaterwire 106 is welded or otherwise fixed to the upper surface of the sheetmetal bracket member 119. A sleeve of insulating material 104 ispositioned around the bimetal 102, the heater wire 106 is wrapped aroundthe insulating material, the other end of the re sistance wire 106 issuitably connected to the bimetal, and an outer sleeve 127 covers thebimetal heater to reduce external losses such as convection currents.Thus, the bimetal itself is electrically hot and functions as a terminalfor one end of the bimetal heater wire 106. With this construction,switch 108 and 109 controls energization of the bimetal heater, and itis in a closed position, as shown in FIG. 10, when the switch blade 110is held away from a switch blade 112 by the lug 114 which is integrallyformed with the upper vertical wall 98 of the bimetal phenolic support.

As the bimetal 102 is heated by the bimetal heater 106, the bimetalitself bows away from the vertical wall 98 of the phenolic insulatingplate, i.e., the central portion of the bimetal tends to move outwardlyand the end portions of the bimetal are forced inwardly. After thebimetal has been heated to a predetermined amount, blade 110, it ismoved away from the vertical wall 98 of the phenolic support until it isunrestricted by the projection 114. At that instant, as shown in FIG.11, the leaf spring switch blade 110 moves upwardly under its springforce to move contact 116 on the switch blade 110 into contact with acontact 118 on switch blade 112 to lift switch blade 112 to thereby openswitch contacts 108 and 109 to de-energize heater 106 to permit thebimetal 102 to cool down. As the bimetal cools down it tends tostraighten out and the end portions which had been urged toward thevertical wall 98 now move away from the vertical wall, particularly thefree end portion 120 used as a switch blade 122 which moves away fromthe vertical wall member 98. Upon continued movement in this direction,a switch contact 124 will abut an end 128 of screw 126 to close asolenoid switch 124 and 128 which signals the termination of the bimetaltimer cool-down cycle.

In accordance with my invention, a unique timer actuator member 92 isprovided for permitting or preventing operation of the heat-up cool-downbimetal timer by controlling the operability of switch blade 1 10. Thetimer 82 is prevented from operating by holding the switch blade 110down as shown in FIG. 12 which prevents movement of the switch blade 110up to the bimetal cool-down position illustrated in FIG. 11 wherein itwould open the contacts 108 and 109 to the bimetal heater 106.

The timer actuator 92 includes an upwardly extending wall 205 which isarranged in the path of a lug 206-207 which is formed on lever 90 of myunique primary manual setting mechanism. It can be appreciated thatmovement of the lug 206 and 207 rearwardly from the position illustratedin FIG. 12 to the position illustrated in FIG. 10 will move the phenolicactuator 92 clockwise about its pivot 204 to thereby lift lug 115 topermit a full cycle of operation of the heat-up cooldown bimetal timer82. Thus, after the bimetal 102 has been heated sufficiently, the switchblade 110 may be moved out from under the fixed lug member 114 to permitupward movement of switch blade 110 to close switch contacts 116 and 118and open contacts 108 and 109 to thereby interrupt the flow of currentto the bimetal heater wire 106 to allow the bimetal to operate in itscool-down cycle.

As shown more particularly in the FIGS. 16 and 17 rear views of thebimetal timer 82, the actuator 92 is preferably formed of phenolicplastic and is pivoted about a shaft 204 which may be connected to thegenerally vertical wall 98 of the timer body. As shown, the timeractuator 92 includes a lower arm 198 for receiving pivot shaft 204 andthe upper slide arm portion 205 which is uniquely shaped and arranged inthe path of lug 206-207 which is formed on latch lever 90 of the primarymanual setting mechanism.

The actuator 92 of the heat-up cool-down bimetal timer is normallyspring urged clockwise to the position illustrated in FIG. 16 by aspring 93. As illustrated, the spring 93 is looped around the shaft 204of the actuator. One end of the spring is held by a lug 196 which may beintegrally formed on the rear surface of the vertical wall 98 of heat-upcool-down bimetal timer body while the other end 91 of the spring abutsa lower surface of the arm 198 of the actuator member to urge theactuator 92 in a clockwise direction as shown in FIGS. 16 and 17.

As shown more particularly in FIGS. 10, 11 and 12, the actuator 92includes an integrally formed lug 115 which extends through a slot 125which may be formed in the generally vertical wall 98 of the timer bodyfor moving switch bladQllO. As shown more particularly in FIG. 12, whenthe lug 207 is spaced from actuator 92, spring 93 of the actuatorrotates the actuator and its lug 115 in a counterclockwise direction asviewed in FIG. 10, 11 and 12 to move the switch blade 110 downwardly toopen contacts 116 and 118 and to close contacts 108 and 109. Thus, itcan be appreciated that when the actuator 92 holds the contacts 116 and118 in their open position the heat-up cool-down bimetal timer isprevented from automatically moving into its cool-down cycle, thecool-down cycle being initiated by the closure of contacts 116-118 andthe opening of contacts 108 and 109. In other words, the lug 115 on theactuator 92 extends inwardly beyond lug 114 so that no matter how farthe bimetal heater 106 moves the switch blade 1 10 from the verticalwall 98, it cannot be moved beyond the movable lug 115 to open thebimetal heater switch 108 and 109.

It can be appreciated that the natural upward bias force on leaf springis greater than the downward spring bias of leaf spring 112.Accordingly, when both spring blades are free to move under theirbuilt-in bias, as shown in FIG. 11, the lower contact 116 on switchblade 110 abuts contact 118 to lift switch blade 112 against its naturaldownward bias to open contacts 108 and 109 and close contacts 1 l6 and 118.

A switch blade member 122 is integral with the free end of bimetal 102for supporting a contact 124 for energizing the solenoid 132 to open themain switch contacts 48-51 and unlatch lug 207 and its lever 90 from theupper surface 205 of the bimetal timer actuator 92 at the end of thecool-down cycle. Thus, at the end of a cool-down cycle spring 93 of theswitch actuator 92 moves the actuator and its lug to the positionillustrated in FIG. 12 to hold the switch blade 110 in its lower timerreset position.

In accordance with my invention, the improved heatup cool-down bimetaltimer includes a unique arrangement for readily calibrating the durationof the heat-up cycle of the bimetal timer and the duration of thecooldown cycle of the bimetal timer. The mechanism for calibrating thetimer during manufacture is also uniquely related to an improvedmechanism for allowing a user to manually control the desired degree ofbrownness of the toast. Briefly, the color cam mechanism for manuallysetting the color and brownness of the toast desired by the userincludes a cam follower plate 178 as shown in FIG. 13 which is movedtoward or away from the generally vertical wall 98 of the timer body bya cam mechanism 192 to control the desired brownness of the toast. Anadjusting screw 180 which is uniquely positioned on the heat-upcool-down timer is utilized to provide a manufacturing adjustment orcalibration in the heat-up cycle of the bimetal timer.

My improved and reliable mechanism for controlling the heat-up timeperiod of-the bimetal includes a leaf spring blade bimetal controlmember 350 as shown in FIG. 15 for very accurately adjusting the pivotpoint of the left or free end of the bimetal 102 to thereby control theheat-up cycle of the bimetal. As shown more particularly in FIGS. 10 and15, the bimetal control blade is positioned between the bimetal and thevertical wall 98 of the bimetal body. As shown in FIG. 10, its right endis fixed to the vertical wall of the control body, it extends closelyadjacent to and generally parallel with the vertical wall 98 of thecontrol body and it includes an L-shaped portion 352 which extendsoutwardly from the vertical wall. With particular reference to theexploded detail view shown in FIG. 15, the end portion of the bimetalcontrol blade 350 includes a generally semivcircular bump 354 whichfunctions as the pivot point for the free end of the bimetal 102. Thecalibration screw 180 is threaded through the end portion 352 of thebimetal control blade relatively close to the pivot 354 for providing amanufacturing adjustment in the distance of the pivot 354 from the camfollower blade 178 and the vertical wall 98 of the timer body. It can beappreciated that as the pivot 354 is spaced further from the verticalwall 98 of the timer body the heat-up time period is decreased since thebimetal 102 will be required to move a shorter distance to move theblade 110 a shorter distance from the position illustrated in F IG. tothe position illustrated in FIG. 1 1 to release the blade 110 from lug114 to allow blade 110 to move blade 112 to open the contacts 108 and109 for the bimetal heater. Thus, the manufacturing calibration of thedistance of the pivot 354 from the vertical wall 98 of the timer body isadjusted by screw 180. An additional adjustment in this distance by auser of the appliance to achieve the desired color and brownness of thetoast is made by rotating cam 192 to move the entire cam follower 178further away from or closer to the vertical wall 98 of the timer body.

The arrangement for making a manufacturing calibration adjustment in theheat-up cycle of the bimetal timer is uniquely spaced and related to amechanism for making a calibration in the'cool-down time period of thebimetal timer. As illustrated more particularly in FIG. 11, thecool-down cycle is terminated when the solenoid switch 124 and 128 isclosed. As illustrated, the contact 124 of the solenoid switch is fixedto the free end 122 of the bimetal while the other contact 128 of thesolenoid switch is formed by the end of a calibration screw 126. Withthis con struction, it can be appreciated that as the end 128 of thescrew 126 is moved further away from the contact 124, the length of thebimetal cool-down time period is increased.

With this unique parallel arrangement of the heat-up calibration screw180 very close to the cool-down calibration screw 126, the heat-up andcool-down time periods of the heat-up cool-down bimetal timer may bereadily made during manufacture. It is significant that in making themanufacturing adjustments in the heatup and cool-down cycles, it is notnecessary to touch the bimetal blade itself which could cause errors dueto deformation of the bimetal. Moreover, the end of the heat-upcalibration screw 180 abuts the cam follower 178 which is very closelyspaced to the vertical wall 98 of the timer body member. Thus, when ascrewdriver is inserted within a slot of screw 180 and pressed towardthe vertical wall 98 of the timer body, relatively great force can beapplied to the screwdriver without deforming any of the criticalcomponents of the heatup cool-down bimetal timer. By this arrangement, avery reliable and accurate manufacturing calibration may be made in myimproved heat-up cool-down bimetal timer.

My improved toast color cam mechanism for manually setting the color andbrownness of the toast desired by a user will now be more particularlydescribed. In accordance with my invention, the entire toast color cammechanism is attached to the timer body, and more particularly, only thevertical wall 98 of the timer body in order to minimize any changes incalibration due to the assembly of the front plate 10 of the oventoaster and other portions of the oven toaster. As shown moreparticularly in FIG. 3, the control cam 192 of the toast brownnesscontrol mechanism extends through a relatively large aperture 355 whichis formed in the front wall 64 of the oven toaster for receiving thecontrol cam 192. It can be seen that a control knob 62 and flange 356may be readily attached to the end of the control cam 192 for coveringthe aperture 355.

As shown in FIGS. l0, l1 and 12, the toast brownness timer control andcam construction includes a timer cam follower plate 178 and anadjusting screw 180. These parts determine the pivot point of the leftend of bimetal 102 and thereby cooperate to set the time when the switch108 and 109 de-energizes the bimetal heater 106 to thereby detemiine thetime interval of the heat-up cool-down bimetal 102 and the toastingcycle. As previously described, a manufacturing adjustment in the lengthof this cycle is initially made by adjusting the position of screw withrespect to the follow-up plate 178. It can be seen that the screw 180 isrotated within the threaded portion of blade 352 to initially adjust therelative position of the end of the screw 180 to the surface of the camfollower plate 178.

As shown more particularly in FIG. 10, the timer cam follower plate 178includes a portion 182 which extends downwardly from the top portion ofthe vertical wall 98 to a position below the bimetal blade 102, anupwardly extending portion 184, a rearwardly extending portion 186 and acam contacting portion 188. As shown in FIG. 13, the top of thegenerally vertical portion 182 is fixed to a leaf spring 190 which isriveted or otherwise secured to the vertical wall 98 of the phenolicsupport. With this construction, the cam follower plate 178, and moreparticularly, the generally vertical cam contacting portion 188 isspring urged outwardly into engagement with a surface of a rotatable cammember 192.

It can be appreciated that counterclockwise rotation of the cam 192manually moves the cam contacting portion 188 of the timer settingmember toward the oven toaster to move the vertical arm 182 of the camfollower plate toward the adjusting screw 126, thereby decreasing thetoasting time interval. Movement of the cam 192 in the oppositedirection allows the cam follower plate 178 to move toward the verticalwall 98 and away from adjusting screw 126 thereby increasing thetoasting time interval. Thus, when the manually rotatable control knob62 is moved in a clockwise direction the length of the toasting timeinterval is increased, and when the timer control knob is rotated in acounterclockwise direction the length of the toasting time cycle isdecreased.

The color cam member 192 and its associated parts are connected to thegenerally vertical wall 98 of the heat-up cool-down bimetal timer by ametal bracket 200. As shown more particularly in FIGS. 12, 13 and 14,the cam member 192 may be integrally formed of a phenolic plasticmaterial to include a number of supporting surfaces and a cam surface358 which is formed at its rear outer periphery for cooperating with thecam contacting portion 188 of the cam follower 178. The cam member 192includes a generally circular bearing portion 360 for cooperating withthe generally circular aperture 362 formed in bracket 200, a generallycircular bearing portion 364 for cooperating with an aperture 366 formedin bracket 200 and an annular groove 368 for receiving a spring clip 370for holding the cam member 192 on the bracket 200. As illustrated, thespring clip 370 is positioned within a notch 372 formed in the bracketand the arms of the clip are positioned within the annular groove 368.

With particular reference to FIG. 12, it can be appreciated that thebracket 200 for holding the cam 192 is generally U-shaped and includesan arm 374 having a notch 376 formed therein for gripping both sides ofthe generally vertical wall 98 of the timer body and an arm 378 whichextends downwardly from the bracket for rigid attachment to thegenerally vertical wall of the timer body by means of a screw 375 orother suitable securing means. By this arrangement, the toast color cam192-358 may be manually adjusted by rotating the knob 62 which extendsfrom the front wall of the oven toaster in order to set the color andbrownness of the toast desired by a user.

OVEN OPERATION When it is desired to operate my improved oven toaster asan oven, the food to be cooked is inserted within the cooking chamber15, and the front door 16 is closed to move the carriage lug 68 and itssleeve bearing 70 rearwardly to the position illustrated in FIG. 6 topermit the switch actuating lever 72-78 to close the main switch 48 and51. Then the push button 60 is lifted from its OFF position to any oneof the plurality of oven temperature setting positions indicated on thefront plate 64. This movement causes the pivoted pushbutton lever 154 tobe moved from its OFF position indicated in FIG. to one of its oventemperature setting positions illustrated in FIG. 6. In moving from theposition illustrated in FIG. 5 to the position illustrated in FIG. 6,the cam drive pin 160 which is fixed to lever 154 is lifted and slidesagainst the upper surface of a slot 165 which is formed in the cam 162to rotate the cam 162 about its pivot 164. This movement causes thedetent lug pin 166-168 to be moved out of the OFF notch 169 of the cam162 and onto the smooth circular surface 171 of the cam 162 to the leftof the OFF notch 169, as illustrated in FIG. 6. This movement causes thedetent lug 166-168 and the lever 71-73 to which it is attached to bemoved downwardly against the force of spring 314 from the positionillustrated in FIG. 5 to the position illustrated in FIG. 6. Thisdownward movement of the lever 71-73 causes corresponding downwardmovement of the pivot 75 for the main switch actuating lever 72-78,which causes the lower portion of arm 72 of the lever to abut an uppersurface of the carriage lug 68-70 to pivot the lever 72-78 about pivotpin 75 thereby moving the left arm 78 of the lever downwardly to movespring 80 downwardly to rotate the cam 83 to close the main switchcontacts 48 and 51.

With the main switch 40 closed at the beginning of OVEN operation, thethermostat switch contacts 232 and 234 are also closed as shown in FIG.8. In this position it can also be appreciated that upward movement ofthe push-button lever 154 from the off position illustrated in FIG. 5 tothe oven position illustrated in FIGS. 6 and 8 causes the thermostat cam240 to be moved from its off notch 248 on lug 244 to one of its onpositions on lug 244. It can be seen that when the cam 240 is rotatedfrom its off position illustrated in FIG. 7 to one of its on positionsillustrated in FIG. 8, the on cam surface 250 of the cam 240 graduallyslides on the end of projection 244 to move the thermostat switch blades212 and 214 and the pin projection 236 further and further away from thebimetal insulator 238. Thus, as the distance between the end of pin 236and the ceramic insulator 238 increases, the further the bimetal 224 hasto travel to open the switch contacts 232 and 234, and hence, the higherthe temperature setting of the oven. As shown by the indicia on thefront plate 64 of the oven toaster, the lower oven temperature settingsare located near the off position while the higher temperature settingsare indicated at the top of the front plate 64. With the oven thermostatin the on position illustrated in FIG. 8, the thermostat 210 maintainsthe oven at the temperature set on the dial at the front of the oventoast by the action of the bimetal 224 in opening and closing thecontacts 232 and 234 of the thermostat.

While the oven toaster is being operated as an oven the heat-upcool-down bimetal timer 82 is prevented from moving into its cool-downcycle to thereby prevent the heat-up cool-down bimetal timer fromopening the main switch 48 and 51. As shown in FIGS.

3, 6 and 11, this is achieved by the position of the timer actuator 92which is controlled by the latch mechanism 146, and particularly its pin206-207. As shown in FIG. 11, the pin 206 simply rests on the actuator92, and in this position the spring 93 of the actuator causes theactuator to be rotated clockwise to move the actuator arm 115 to thebottom of slot 117 to lower switch blade 110 to thereby maintain switchcontacts 116 and 118 in their open position to prevent movement of theheat-up cool-down bimetal timer to its cool-down position.

During OVEN operation, an arrangement is provided for supplying alimited flow of current to the bimetal heater 106 in order to preheatthe bimetal to about the same amount that it would be preheated by aTOAST cycle operation. Thus, should the oven toaster be used fortoasting a slice of bread immediately following its use as an oven, thepreheated timer 82 will properly control the degree of brownness of thetoast. With particular reference to FIGS. 2 and 15, this is achieved byclosing the function switch 262 during the oven operation to supply alimited amount of current to the bimetal heater 106 through the shuntresistor 260. As shown in FIG. 15, the function switch 262 is closed asthe push-button lever 154 is lifted from the OFF position illustrated inFIG. 5 to the OVEN position illustrated in FIG. 6 to provide current tothe bimetal heater 106 during OVEN operation.

While the oven toaster is being operated as an oven, it should beappreciated that should the front door 16 be opened even a small amount,the flow of current to the heating elements will be immediately stoppedby opening the main switch 40. This results since even a slight openingof the door moves pin 68 and its sleeve bearing forwardly from theposition illustrated in FIG. 3 to allow the main switch spring blades 44and 48 to rotate the switch cam 82 to the OFF position illustrated inFIG. 5. The spring blades themselves are strong enough to move the cam82 downwardly when the spring actuator is allowed to be moved slightlyupwardlyto pivot le ver 72-78 clockwise as the pin 68 and its'sleeve 70are moved forwardly when the door 7 Should it be desired to use the oventoaster to toast a slice of bread after it hasbeen' used as an oven, itis merely necessary to place one or more slices of bread on the foodrack 4, close the door, and move the push button 60 downwardlyfroml-itsOFF positionfto its TOAST position. If the toast brownness knob62 had been previously set to the desired brownness, there is normallynoreason to make any adjustment in the brownness control knob 62 since thebimetal 102 of the timer 82 would have been preheated through the shuntresistor 260 and the function switch 262 while the cooking chamber wasbeing used as an oven. Thus, the cooking chamber 15 and the heat-upcool-down bimetal timer 82 would be at about the same'relativetemperature with respect to each other followingoven operation as theywould be atthe end of a prior toasting operation. Accordingly, theposition'of the rotatable brownness control knob 62 does not have to beadjusted unless it is desired to make a darker or lighter slice of toastthan had been obtained during a prior toasting operation. I I

When the push-button knob 60 is moved downwardly fromits OFF position,illustratedin FIG. to its TOAST position illustrated in FIG. 4, anumber of things happen almost simultaneously. The rotatable cam 162 is'rotatedin a clockwise direction-about its pivot 164 by the drive pin160 which is fixed to and moves downwardly withthe push-button lever154. As the pin 160 rotates the cam 162, rotation of the cam forces thedetent lug. 166 out of the off notch 169 against the force of spring314. to position the detent lug on the raised toast cam surface 167 ofthe rotatable cam 162. This results ina downward motion of lever 71-73to cause a downward movement of the pivot 75 for lever 72-78. Since thedoor is in its closed position,

the outwardly extendingpinr68 on the food. carriage link 28 is :in'theposition illustrated in FIGS. 4 and 5. Thus, when the pivoted lever 154is moved from the position shown in FIG. 5 to the position shown in FIG.4, downward movement ofthe pivot 75 rotates the lever 72-78 in acounterclockwise direction to move I the switch actuator lever 80downwardly to thereby rotate the can 82 to close switch contacts 48-51to energize the heating elements to toast a slice of bread.

During movement of the lever 154 from the OFF position shown in FIG. 5to the TOAST position shown in FIG. 4, the movement is opposed by thecoil spring 158 which is compressed between the plastic button 337 whichis fixed to the forward tab 338 of the pushbutton lever and theoutwardly extending tab 326 which is formed on supporting plate 267.Downward movement of the lever 154 also causes downward movement oflever 320 and the lug 152which extends outwardly from' lever 320.Thisdownward movement of lug 152 causes it to move into the latch slot150 of lever 146 to pivotthe lever 146 in a counterclockwise directionabout pivot pin 148. Counterclockwise-movement of lever 146 causes agenerally rearward movement of the lugs 144 and 206 which areattached tothe lower portion of lever 146. Lug 144 cooperates with a latch notch142 which is formed in the solenoid lever 88-140, and thus, rearwardmovement of the lug 144 on the lower surface of lever 140 allows the lugand its sleeve bearing 161 to roll or slide rearwardly until they are.positioned within the notch 142. At that time further rearward movementis restricted by the rear surface of the notch. During this rearwardmovement 'of the lug 144 on the lower surface of lever 140, an internalspring of the solenoid 132 urges the solenoid lever 88-140 in acounterclockwise direction about pivot pin 346. Thus, when the pin 144reaches the notch 142, the entire solenoid lever 88-140 is pivoted in acounterclockwise direction by the internal spring of the solenoid tomove the lug 144 into notch 142. Accordingly, as shown in FIG. 4 latchnotch 142 holds latch lever 146 which in turn holds the lug pin 152 oflever 320 to hold the primary manual setting lever 154 in its downwardTOAST position against the force of spring 158 during the entiretoasting cycle.

At the same instant that the lug 144 is moved rear- 'wardly into thelatch notch 142, lug 206 and its sleeve bearing 207 is also movedrearwardly to move the bimetal timer actuator 92 from its OFF positionillustrated in FIG. 11 to its TOAST position illustrated in FIG. 12.This movement is resiliently opposed by spring 93 which normally holdsthe actuator 92 and its lug 115 downwardly to prevent contacts 108-109from being opened and contacts 116-118 from being closed to therebyprevent the heat-up cool-down bimetal timer 82 from shifting from itsheat-up cycle to its cool-down cycle. Thus, at the beginning of theTOAST cycle lug 206 and its sleeve bearing 207 pivots the bimetalactuator 92 clockwise to lift lug 115 above switch blade 110 to pemiitthe switch blade to be moved upwardly at the end of the bimetal heat-upcycle to permit cool-down operation of the timer 82.

When the push-button lever 154 is moved downwardly from its OFF positionillustratedin'FlG. 5 to its TOAST position illustrated in FIG. 4, itoperates on-the top surface of the insulated tab 264 and lever 294 tomove the insulated tab 264 downwardly to open the function switch 262during. the TOAST cycle. Thus, the'shunt resistor 260 is effectivelyremoved from the circuit during the toasting cycle and the full currentis applied to the bimetal heater wire 106 during the toasting cycle.

The parts of the bimetal heat-up cool-down timer remain in the positionsillustrated in FIGS. 2, l2 and 14 during the bimetal heat-up cycle. Asthe bimetal 102 is heated, its central portion bulges outwardly awayfrom the generally vertical wall 98 to move the switch lever 110 whichis connected to it from the position illustrated in FIG. 14 to theposition illustrated in FIG. 13. When the switch lever reaches theposition shown in FIG. 13, it has moved .far enough outwardly from aplastic lug l 14 which is integrally formed with the vertical wall 98 ofthe bimetal support, that it moves out from under the lug 114. Since theswitch lever 110 is I normally spring biased upwardly it slides upwardlyon the outer surface of the lug' 114 to move the transverse switch blade112 upwardly to close contacts 116-118 and'open contacts 108-109 tothereby terminate the flow of current to the bimetal heater wire 106 toplace the bimetal heat-up cool-down timer in its cool-down position. Thecontacts 116-118 remain closed to permit a continuous flow of current tothe heating elements 22, 23, 24 and 25 of the oven toaster while theoven toaster bimetal timer 82 is in its cool-down cycle.

As the bimetal 102 cools down, its left end which is provided withcontact 124 moves toward a contact screw 126. This occurs since theswitch blade 110 is now restrained from moving inwardly from theposition shown in FIG. 13 to the position shown in FIG. 14 by theabutment 114. Thus, the contact 124 at the end of the bimetal 102 movestoward the contact screw 126 during the bimetal cool-down cycle.

As shown in FIG. 2, when the contact 124 is moved into engagement withcontact screw 126 the circuit to the solenoid 132 is closed, and withreference to FIGS. 4 and the solenoid 132 pulls the solenoid lever 88 tothe right about its pivot pin 344 to cause the hammer 136 to ring thebell 138 to indicate the end of a toasting cycle. At the same instant,the solenoid .lever 88 lifts its arm 140 to release lug 144 from latchnotch 142 to allow lever 146 to pivot clockwise under the force ofsprings 158 and 93 to release latch notch 150 from pin 152 to permit theprimary manual setting lever 154 to be moved upwardly to its OFFposition'illustrated in FIG. 5. At the same instant that the lever 154is moved upwardly, its cam 162 is rotated in a counterclockwisedirection to move the detent lug 166 from the TOAST cam surface 167 intothe OFF notch 169. During this movement, it can be appreciated that thelever 71-73 is moved upwardly by spring 314 to move pivot 75 upwardly toallow lever 72- 78 to be rotated in a clockwise direction about pivot 75to lift the end of lever 78 and the spring actuating lever 80 of switch40 to open the main switch contacts 48-51.

From the foregoing description it will be appreciated that my improvedheat-up cool-down bimetal timer may be very accurately adjusted andcalibrated during manufacture. The manufacturing adjustment orcalibration in the heat-up time period of the bimetal is adjusted by ascrew 180 which is fixed to a separate bimetal control blade 350 whichis positioned between the bimetal and the generally vertical wall 98 ofthe timer body. The screw 180 abuts a substantial cam follower plate 178and the adjustment may .be made without touching the bimetal blade 102,thus, reducing calibration errors due to operator deformation of thebimetal blade. The adjusting screw 180 for the heat-up cycle is closelypositioned adjacent to the calibration screw 126 for the cool-down cycleso that both adjustments can be readily made at the same time. It canalso be appreciated that the manual toast color cam mechanism 192-200 isconnected to the relatively rigid vertical wall 98 of the timer body inorder to minimize changes in calibration due to manufacturing tolerancesbetween the front plate and other components of the oven toaster.Accordingly, an exceedingly reliable and accurate heat-up cool-downbimetal timer is achieved with relatively few parts which may be readilyconnected to each other.

What I claim is:

1. An electric toaster with a heat-up cool-down bimetal timercomprising:

a. a rigid timer body member;

b. an electric resistance wire heater for toasting a slice of bread;

c. a first electric circuit including said electric resistance wire fortoasting a slice of bread;

d. a heat-up cool-down bimetal having two end portions, one of the endportions of said bimetal being connected to said body member and theother end portion being a free end portion;

e. a second electric circuit including an electric resistance wire forheating said bimetal;

f. a bimetal control member positioned adjacent to said bimetaland beingprovided with a pivot surface which is arranged in engagement with thefree end portion of said bimetal;

g. a pair of switch contacts in said second electric circuit which areclosed for energizing the electric resistance wire for heating thebimetal during its heat-up cycle and opened by said bimetal to preventenergization of said electric resistance wire for heating said bimetalwhen the bimetal is in its cool-down cycle; and

h. a calibration member movably supported on said bimetal control memberfor setting the position of said bimetal control member and its pivotfor the bimetal for controlling the amount of movement of the bimetalnecessary to open said switch contacts to thereby control the durationof said bimetal heat-up, cycle.

2. An electric toaster with a heat-up cool-down bimetal timer as definedin claim 1 wherein said calibration member is a screw which is threadedthrough said bimetal control member.

3. An electric toaster with a heat-up cool-down bimetal timer as definedin claim 1 wherein a timer actuating member is rotatably mounted on saidtimer body member for preventing or allowing said pair of contacts to bemoved to an open position.

4. An electric toaster with a heat-up cool-down bimetal timer as definedin claim 3 wherein a switch blade is mounted on said timer body adjacentto said first pair of switch contacts for opening and closing saidswitch contacts and said timer actuating member is positioned adjacentto said switch blade for selectively holding said switch blade in oneposition to prevent said switch blade from opening said contacts as aresult of heating the bimetal.

5. An electric toaster with a heat-up cool-down bimetal timer as definedin claim 1 wherein said timer actuating member is rotatably mounted onsaid timer body member and is spring biased toward said switch blade forholding said switch blade to prevent said pair of switch contacts insaid second electric circuit from being opened by said bimetal.

6. An electric toaster with a heat-up cool-down bimetal timercomprising:

a. a rigid timer body member;

b. an electric resistance wire heater for toasting a slice of bread;

0. a first electric circuit including said electric resistance wire fortoasting a slice of bread;

d. a heat-up cool-down bimetal having two end portions, one of the endportions of said bimetal being connected to said body member and theother end portion being a free end portion;

e. a second electric circuit including an electric resistance wire forheating said bimetal and said electric resistance wire for toasting aslice of bread;

f. a bimetal control blade connected to said body member and positionedadjacent to said bimetal,

1. An electric toaster with a heat-up cool-down bimetal timercomprising: a. a rigid timer body member; b. an electric resistance wireheater for toasting a slice of bread; c. a first electric circuitincluding said electric resistance wire for toasting a slice of bread;d. a heat-up cool-down bimetal having two end portions, one of the endportions of said bimetal being connected to said body member and theother end portion being a free end portion; e. a second electric circuitincluding an electric resistance wire for heating said bimetal; f. abimetal control member positioned adjacent to said bimetal and beingprovided with a pivot surface which is arranged in engagement with thefree end portion of said bimetal; g. a pair of switch contacts in saidsecond electric circuit which are closed for energizing the electricresistance wire for heating the bimetal during its heat-up cycle andopened by said bimetal to prevent energization of said electricresistance wire for heating said bimetal when the bimetal is in itscool-down cycle; and h. a calibration member movably supported on saidbimetal control member for setting the position of said bimetal controlmember and its pivot for the bimetal for controlling the amount ofmovement of the bimetal necessary to open said switch contacts tothereby control the duration of said bimetal heatup cycle.
 2. Anelectric toaster with a heat-up cool-down bimetal timer as defined inclaim 1 wherein said calibration member is a screw which is threadedthrough said bimetal control member.
 3. An electric toaster with aheat-up cool-down bimetal timer as defined in claim 1 wherein a timeractuating member is rotatably mounted on said timer body member forpreventing or allowing said pair of contacts to be moved to an openposition.
 4. An electric toaster with a heat-up cool-down bimeTal timeras defined in claim 3 wherein a switch blade is mounted on said timerbody adjacent to said first pair of switch contacts for opening andclosing said switch contacts and said timer actuating member ispositioned adjacent to said switch blade for selectively holding saidswitch blade in one position to prevent said switch blade from openingsaid contacts as a result of heating the bimetal.
 5. An electric toasterwith a heat-up cool-down bimetal timer as defined in claim 1 whereinsaid timer actuating member is rotatably mounted on said timer bodymember and is spring biased toward said switch blade for holding saidswitch blade to prevent said pair of switch contacts in said secondelectric circuit from being opened by said bimetal.
 6. An electrictoaster with a heat-up cool-down bimetal timer comprising: a. a rigidtimer body member; b. an electric resistance wire heater for toasting aslice of bread; c. a first electric circuit including said electricresistance wire for toasting a slice of bread; d. a heat-up cool-downbimetal having two end portions, one of the end portions of said bimetalbeing connected to said body member and the other end portion being afree end portion; e. a second electric circuit including an electricresistance wire for heating said bimetal and said electric resistancewire for toasting a slice of bread; f. a bimetal control blade connectedto said body member and positioned adjacent to said bimetal, saidbimetal control blade being provided with a pivot surface which isarranged in engagement with the free end portion of said bimetal; g. apair of switch contacts in said second electric circuit which are closedfor energizing the electric resistance wire for heating the bimetalduring its heat-up cycle and opened to prevent energization of saidelectric resistance wire for heating said bimetal when the bimetal is inits cool-down cycle; h. an actuator blade connected to said bimetal andin operative connection with said switch contacts to open said switchcontacts after said bimetal has moved a predetermined amount during itsheat-up cycle; and i. a calibration member movably supported on the freeend portion of said bimetal control blade for setting the position ofsaid bimetal control blade and its pivot for the bimetal for controllingthe amount of movement of the bimetal necessary to open said switchcontacts to thereby control the duration of said bimetal heat-up cycle.7. An electric toaster with a heat-up cool-down bimetal timercomprising: a. a rigid timer body member; b. an electric resistance wireheater for toasting a slice of bread; c. a first electric circuitincluding said electric resistance wire for toasting a slice of bread;d. a heat-up cool-down bimetal having two end portions, one of the endportions of said bimetal being connected to said body member and theother end portion being a free end portion; e. a second electric circuitincluding an electric resistance wire for heating said bimetal and saidelectric resistance wire for toasting a slice of bread; f. a bimetalcontrol member having a pivot surface arranged in pivotal engagementwith the free end portion of said bimetal; g. a pair of switch contactsin said second electric circuit which are closed for energizing theelectric resistance wire for heating the bimetal during its heat-upcycle and opened by said bimetal to prevent energization of saidelectric resistance wire for heating said bimetal when the bimetal is inits cool-down cycle; and h. a manually adjustable member connected tosaid body member and positioned between said body member and saidbimetal control member for adjusting the position of said bimetalcontrol member with respect to the body member and the bimetal.
 8. Anelectric toaster with a heat-up cool-down bimetal timer as defined inclaim 7 wherein said manually adjustable member includes a cam followerwhich is integrally formed therewith aNd a cam is provided for movingsaid cam follower, said cam being rotatably supported for movement on abracket which is rigidly fixed to said timer body so that the supportingbracket for said cam is fixed with respect to the timer body to minimizeany calibration errors due to movement between the support for thebimetal and the support for the cam.
 9. An electric toaster with aheat-up cool-down bimetal timer comprising: a. a first electric circuitincluding an electric resistance wire heater for toasting a slice ofbread; b. a main switch for controlling energization of said electricresistance wire heater; c. an electric solenoid for opening the mainswitch at the end of the toasting cycle; d. a generally L-shaped timerbody member formed of suitable insulating material having a generallyvertical wall portion and generally horizontal wall portion; e. aheat-up cool-down bimetal having two end portions, one of the endportions of said bimetal being connected to said body member and theother end portion being a free end portion; f. a second electric circuitincluding an electric resistance wire for heating said bimetal; g. afirst pair of switch contacts mounted on said body member forcontrolling energization of said electric resistance wire bimetalheater; h. a second pair of contacts outside of said bimetal heatercircuit for controlling energization of said main electric toasterheater circuit when the first pair of switch contacts are opened duringbimetal cool-down; i. a third pair of contacts mounted on saidsupporting member for controlling energization of said solenoid at thetermination of said cool-down cycle, one of said contacts of said thirdpair of contacts being mounted at the end of the bimetal and being movedinto contact with the other contact of said third pair of contacts whenthe bimetal cools down at the end of a toasting cycle; j. a manuallyadjustable mechanism for setting toast brownness by adjusting a pivotpoint of the bimetal and the relative position of said one of saidcontacts of said third pair of contacts to the other contact of saidthird pair of contacts including: j1. a flexible bimetal control blademounted on the generally vertical wall portion of said body member andpositioned between said wall and said bimetal, said control blade havinga pivot surface arranged in pivotal engagement with the free end portionof said bimetal; j2. a heat-up calibration screw threaded through anaperture formed in the end of said bimetal control blade extendingtoward the generally vertical wall portion of the body member; j3. a camfollower resiliently mounted on the generally vertical wall of said bodymember and positioned adjacent to an end of said heat-up calibrationscrew; j4. a cam positioned adjacent to said cam follower for movingsaid cam follower toward or away from said heat-up calibration screw tomove the end of said flexible bimetal control blade and its pivot awayfrom said vertical wall to move the bimetal and said one of saidcontacts of said third pair of contacts toward said other contact ofsaid third pair of contacts; and j5. said heat-up calibration screwbeing movable within the aperture formed in the end of said flexibleblade for adjusting the distance between the cam follower and thebimetal control blade to provide a manufacturing adjustment in thebrownness setting of the heat-up cool-down bimetal timer.
 10. Anelectric toaster with a heat-up cool-down bimetal timer as defined inclaim 6 wherein a cool-down calibration screw is threaded through abracket which is fixed to the vertical wall portion of said timer bodyand extends toward the generally vertical wall portion of the body, theend portion of said cool-down adjusting screw being the other contact ofsaid third pair of contacts, and said heat-up and cool-down calibrationscrews extending in the same direction and being positioned adjacent toeach other so that both of said screws May be readily adjusted duringmanufacture of the heat-up cool-down bimetal timer.
 11. An electrictoaster with a heat-up cool-down bimetal timer comprising: a. a firstelectric circuit including an electric resistance wire heater fortoasting a slice of bread; b. a main switch for controlling energizationof said electric resistance wire heater; c. an electric solenoid foropening the main switch at the end of the toasting cycle; d. a generallyL-shaped timer body member formed of suitable insulating material havinga generally vertical wall portion and a generally horizontal wallportion; e. a heat-up cool-down bimetal having two end portions, one ofthe end portions of said bimetal being connected to said body member andthe other end portion being a free end portion member; f. a secondelectric circuit including an electric resistance wire for heating saidbimetal; g. a switch contact fixed to said bimetal; h. a second switchcontact formed as an adjusting screw spaced outwardly from said bimetalfor cooperating with said first contact to energize said solenoid at theend of the cool-down cycle of said bimetal; i. a flexible bimetalcontrol blade positioned between said vertical body wall and saidbimetal; and j. an adjusting screw threaded through said bimetal controlblade for adjusting the relative position of said control blade and saidbimetal to said generally vertical wall to thereby adjust the heat-uptime period of said bimetal during manufacture by rotating saidadjusting screw.
 12. A heat-up cool-down bimetal timer as defined inclaim 11 wherein a cam follower plate is positioned between saidvertical wall and said adjusting screw, and a rotatable cam is providedfor moving said cam follower to move said adjusting screw to therebyadjust the relative position of said flexible bimetal control blade withrespect to said vertical wall in order to manually adjust the heat-upcycle of said timer to thereby provide a manual adjustment in the totaltime interval set by said bimetal timer.
 13. An electric toaster with aheat-up cool-down bimetal timer comprising: a. a rigid timer bodymember; b. an electric resistance wire heater for toasting a slice ofbread; c. a first electric circuit including said electric resistancewire for toasting a slice of bread; d. a heat-up cool-down bimetalhaving two end portions, one of the end portions of said bimetal beingconnected to said body member and the other end portion being a free endportion; e. a second electric circuit including an electric resistancewire for heating said bimetal; f. a pair of switch contacts in saidsecond electric circuit which are closed for energizing the electricresistance wire for heating the bimetal during its heat-up cycle andopened by said bimetal to prevent energization of said electricresistance wire for heating said bimetal when the bimetal is in itscool-down cycle; g. a timer actuating member rotatably mounted on saidtimer body member for preventing or allowing said pair of switchcontacts to be moved to an opened position by heating of the bimetal,said actuator being movable to an off position wherein said pair ofcontacts are prevented from being opened and said actuator being movableto an on position for allowing said pair of contacts to be opened at theend of a bimetal heat-up cycle to thereby permit toaster operation ofsaid bimetal timer; and h. a primary manual setting mechanism mountedfor movement to any one of a plurality of positions to control operationof said timer, said primary manual setting mechanism having an offposition wherein it is spaced from said timer actuating member forpermitting said timer actuating member to retain said pair of saidcontacts in their closed position, and said primary manual settingmechanism being movable to an on position for moving said timeractuating member to permit said pair of contacts to be moved to an openposition at the end of a bimetal heat-up cycle.